US4290280A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Padlock
Assignee: Individual
•
Filing: 1979-03-23
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Granted: 1981-09-22
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Expires: 1999-03-23
Abstract
Abstract Padlock made of a body cast as a frame block having a cylinder assembly space and shackle holes. The assembly space has securing members extending thereinto. A semi-circular shackle has a center portion and two ends which are slidable through the shackle holes and co-act with locking edges of locking bars. The locking bars together with operatively associated cam form the locking member unit which is housed in the assembly space. A cylinder assembly unit is operatively associated with the cam and comprises the usual pin and spring tumbler unit. A closing member seals the bottom of the padlock. Portions of the frame block can extend up around the shackle covering all but the center portion.
Inventors
- 👤 Sun Y. Yun
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:30
CPC Classifications
E; E05; E05B; E05B67/00; E05B67/06; E05B67/22; E05B67/24; Y; Y10; Y10T; Y10T70/00; Y10T70/40; Y10T70/413; Y10T70/437; Y10T70/446; Y10T70/452; Y10T70/459; Y10T70/487; Y10T70/489
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
165 words
Padlock comprising a body case as a frame block having a cylinder assembly space and shackle holes, said cylinder assembly space having securing members extending thereinto; a semi-circular shackle having a center portion and two ends slidable through said shackle holes; a locking member unit housed in said space and having a cam and locking bars operatively associated with said cam, each said bar having a locking edge for co-acting with one of said shackle ends, and a rear portion, springs, said locking bars being biased into engagement with said shackle ends by the action of said springs against said rear portions, said cam having L-shaped stopping points into which said rear portions are biased; a cylinder assembly unit operatively associated with said cam for lockingly operating said locking member unit; a closing member; and screw means for securing said cylinder assembly to one securing member in said cylinder assembly space and for securing said closing member to another securing member in said frame block.
Claim 2
Dependent Claim
165 words
Padlock comprising a body case as a frame block having a cylinder assembly space and shackle holes, said cylinder assembly space having securing members extending thereinto; a semi-circular shackle having a center portion and two ends slidable through said shackle holes; a locking member unit housed in said space and having a cam and locking bars operatively associated with said cam, each said bar having a locking edge for co-acting with one of said shackle ends, and a rear portion, springs, said locking bars being biased into engagement with said shackle ends by the action of said springs against said rear portions, said cam having L-shaped stopping points into which said rear portions are biased; a cylinder assembly unit operatively associated with said cam for lockingly operating said locking member unit; a closing member; and screw means for securing said cylinder assembly to one securing member in said cylinder assembly space and for securing said closing member to another securing member in said frame block.
Claim 3
Dependent Claim
11 words
Padlock according to claim 1, wherein each locking bar is chamfered.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-09-21 | 1985-03-23 | 1985-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-21 | 1989-03-23 | 1989-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-21 | 1993-03-23 | 1993-09-22 | $7700.00 | Window Closed / Lapsed |